Urrunaga reservoir

Araba/Álava · Euskadi

Ebro basin Reservoirs in EuskadiHydroelectric

Province: Araba/Álava
Basin: Ebro
River: Santa Engracia
Dam: Buttress · 1957

56.9%

Current level

41 hm³

Stored water

72 hm³

Total capacity

-1.0 hm³

Weekly change

-4.0 hm³

Vs. 2025

-2.8 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Urrunaga reservoir (embalse de Urrunaga), in the Ebro basin and linked to Legutiano/Villa Real, Araba/Álava and Euskadi, is at 56.9% of its capacity, holding 41 hm³ against a maximum capacity of 72 hm³. It is currently falling, by 1.0 hm³ this week.

Compared with 2025: below (-5.6 points). Compared with the recent historical mean: below (-3.9 points).

Its main uses include water supply and hydroelectric power.

References
Reference	Level	Difference
Previous week	58.3%	-1.4 pts
Same week 2025	62.5%	-5.6 pts
10-year mean	60.8%	-3.9 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Legutiano/Villa Real
River: Santa Engracia
Dam type: Buttress
Year built: 1957
Surface area: 785 ha
Upstream: Albiña
Downstream: Mequinenza

Recorded uses

Water supply
Electricity
Fishing

Not recorded: irrigation, industrial, boating, swimming, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET